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Heiko Schocher ba6fb2f6ac dm: i2c-gpio: add support for clock stretching 
This adds support for clock stretching to the i2c-gpio driver. This is
accomplished by switching the GPIO used for the SCL line to an input
when it should be driven high, and polling on the SCL line value until
it goes high (indicating that the I2C slave is no longer pulling it
low).

This is enabled by default; for gpios which cannot be configured as
inputs, the i2c-gpio,scl-output-only property can be used to fall back
to the previous behavior.

Signed-off-by: Michael Auchter <michael.auchter@ni.com>
Cc: Heiko Schocher <hs@denx.de>
Reviewed-by: Heiko Schocher <hs@denx.de>
2020-03-16 07:55:06 +01:00
..
i2c-at91.txt i2c: atmel: DT binding for i2c driver 2016-08-15 22:12:00 +02:00
i2c-cdns.txt i2c: Describe Cadence I2C devicetree bindings 2016-04-13 18:29:07 +02:00
i2c-designware.txt i2c: designware_i2c: Bring in the binding file 2020-01-27 07:20:42 +01:00
i2c-gpio.txt dm: i2c-gpio: add support for clock stretching 2020-03-16 07:55:06 +01:00
i2c-mux.txt dm: i2c: Add support for multiplexed I2C buses 2015-08-05 21:06:10 -06:00
i2c-stm32.txt i2c: add i2c driver for stm32 2017-08-23 07:04:40 +02:00
i2c.txt DM: I2C: Introduce 'u-boot, i2c-transaction-bytes' property 2019-04-11 15:21:33 +02:00
nvidia,tegra186-bpmp-i2c.txt dt-bindings: add Tegra186 BPMP I2C binding 2016-08-04 13:36:59 -07:00
tegra20-i2c.txt Prepare v2012.04-rc2; minor Coding Style cleanup 2012-04-16 23:13:51 +02:00